/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <uielement/statusbarmanager.hxx>
#include <uielement/genericstatusbarcontroller.hxx>

#include <framework/sfxhelperfunctions.hxx>
#include <framework/addonsoptions.hxx>
#include <uielement/statusbarmerger.hxx>
#include <uielement/statusbaritem.hxx>
#include <com/sun/star/frame/XLayoutManager.hpp>
#include <com/sun/star/frame/theStatusbarControllerFactory.hpp>
#include <com/sun/star/ui/ItemStyle.hpp>
#include <com/sun/star/ui/ItemType.hpp>
#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/awt/Command.hpp>
#include <com/sun/star/ui/XStatusbarItem.hpp>
#include <comphelper/processfactory.hxx>
#include <comphelper/sequence.hxx>
#include <toolkit/helper/vclunohelper.hxx>
#include <svtools/statusbarcontroller.hxx>
#include <tools/debug.hxx>

#include <utility>
#include <vcl/commandevent.hxx>
#include <vcl/event.hxx>
#include <vcl/status.hxx>
#include <vcl/svapp.hxx>
#include <vcl/settings.hxx>
#include <vcl/commandinfoprovider.hxx>

#include <cassert>

using namespace ::com::sun::star;

namespace framework
{

namespace
{

template< class MAP >
struct lcl_UpdateController
{
    void operator()( typename MAP::value_type &rElement ) const
    {
        try
        {
            if ( rElement.second.is() )
                rElement.second->update();
        }
        catch ( uno::Exception& )
        {
        }
    }
};

template< class MAP >
struct lcl_RemoveController
{
    void operator()( typename MAP::value_type &rElement ) const
    {
        try
        {
            if ( rElement.second.is() )
                rElement.second->dispose();
        }
        catch ( uno::Exception& )
        {
        }
    }
};

StatusBarItemBits impl_convertItemStyleToItemBits( sal_Int16 nStyle )
{
    StatusBarItemBits nItemBits( StatusBarItemBits::NONE );

    if (( nStyle & css::ui::ItemStyle::ALIGN_RIGHT ) == css::ui::ItemStyle::ALIGN_RIGHT )
        nItemBits |= StatusBarItemBits::Right;
    else if ( nStyle & css::ui::ItemStyle::ALIGN_LEFT )
        nItemBits |= StatusBarItemBits::Left;
    else
        nItemBits |= StatusBarItemBits::Center;

    if (( nStyle & css::ui::ItemStyle::DRAW_FLAT ) == css::ui::ItemStyle::DRAW_FLAT )
        nItemBits |= StatusBarItemBits::Flat;
    else if ( nStyle & css::ui::ItemStyle::DRAW_OUT3D )
        nItemBits |= StatusBarItemBits::Out;
    else
        nItemBits |= StatusBarItemBits::In;

    if (( nStyle & css::ui::ItemStyle::AUTO_SIZE ) == css::ui::ItemStyle::AUTO_SIZE )
        nItemBits |= StatusBarItemBits::AutoSize;
    if ( nStyle & css::ui::ItemStyle::OWNER_DRAW )
        nItemBits |= StatusBarItemBits::UserDraw;

    if ( nStyle & css::ui::ItemStyle::MANDATORY )
        nItemBits |= StatusBarItemBits::Mandatory;

    return nItemBits;
}

}

StatusBarManager::StatusBarManager(
    uno::Reference< uno::XComponentContext > xContext,
    uno::Reference< frame::XFrame >  rFrame,
    StatusBar* pStatusBar ) :
    m_bDisposed( false ),
    m_bFrameActionRegistered( false ),
    m_bUpdateControllers( false ),
    m_pStatusBar( pStatusBar ),
    m_xFrame(std::move( rFrame )),
    m_xContext(std::move( xContext ))
{

    m_xStatusbarControllerFactory = frame::theStatusbarControllerFactory::get(
        ::comphelper::getProcessComponentContext());

    m_pStatusBar->AdjustItemWidthsForHiDPI();
    m_pStatusBar->SetClickHdl( LINK( this, StatusBarManager, Click ) );
    m_pStatusBar->SetDoubleClickHdl( LINK( this, StatusBarManager, DoubleClick ) );
}

StatusBarManager::~StatusBarManager()
{
}

StatusBar* StatusBarManager::GetStatusBar() const
{
    SolarMutexGuard g;
    return m_pStatusBar;
}

void StatusBarManager::frameAction( const frame::FrameActionEvent& Action )
{
    SolarMutexGuard g;
    if ( Action.Action == frame::FrameAction_CONTEXT_CHANGED )
        UpdateControllers();
}

void SAL_CALL StatusBarManager::disposing( const lang::EventObject& Source )
{
    SolarMutexGuard g;

    if ( m_bDisposed )
        return;

    RemoveControllers();

    if ( Source.Source == uno::Reference< uno::XInterface >( m_xFrame, uno::UNO_QUERY ))
        m_xFrame.clear();

    m_xContext.clear();
}

// XComponent
void SAL_CALL StatusBarManager::dispose()
{
    uno::Reference< lang::XComponent > xThis(this );

    {
        lang::EventObject aEvent( xThis );
        std::unique_lock aGuard(m_mutex);
        m_aListenerContainer.disposeAndClear( aGuard, aEvent );
    }
    {
        SolarMutexGuard g;
        if ( m_bDisposed )
            return;

        RemoveControllers();

        // destroy the item data
        for ( sal_uInt16 n = 0; n < m_pStatusBar->GetItemCount(); n++ )
        {
            AddonStatusbarItemData *pUserData = static_cast< AddonStatusbarItemData *>(
                m_pStatusBar->GetItemData( m_pStatusBar->GetItemId( n ) ) );
            delete pUserData;
        }

        m_pStatusBar.disposeAndClear();

        if ( m_bFrameActionRegistered && m_xFrame.is() )
        {
            try
            {
                m_xFrame->removeFrameActionListener( uno::Reference< frame::XFrameActionListener >(this) );
            }
            catch ( const uno::Exception& )
            {
            }
        }

        m_xFrame.clear();
        m_xContext.clear();

        m_bDisposed = true;
    }
}

void SAL_CALL StatusBarManager::addEventListener( const uno::Reference< lang::XEventListener >& xListener )
{
    SolarMutexGuard g;

    /* SAFE AREA ----------------------------------------------------------------------------------------------- */
    if ( m_bDisposed )
        throw lang::DisposedException();

    std::unique_lock aGuard(m_mutex);
    m_aListenerContainer.addInterface( aGuard, xListener );
}

void SAL_CALL StatusBarManager::removeEventListener( const uno::Reference< lang::XEventListener >& xListener )
{
    std::unique_lock aGuard(m_mutex);
    m_aListenerContainer.removeInterface( aGuard, xListener );
}

// XUIConfigurationListener
void SAL_CALL StatusBarManager::elementInserted( const css::ui::ConfigurationEvent& )
{
    SolarMutexGuard g;

    if ( m_bDisposed )
        return;
}

void SAL_CALL StatusBarManager::elementRemoved( const css::ui::ConfigurationEvent& )
{
    SolarMutexGuard g;

    if ( m_bDisposed )
        return;
}

void SAL_CALL StatusBarManager::elementReplaced( const css::ui::ConfigurationEvent& )
{
    SolarMutexGuard g;

    if ( m_bDisposed )
        return;
}

void StatusBarManager::UpdateControllers()
{
    if ( !m_bUpdateControllers )
    {
        m_bUpdateControllers = true;
        std::for_each( m_aControllerMap.begin(),
                       m_aControllerMap.end(),
                       lcl_UpdateController< StatusBarControllerMap >() );
    }
    m_bUpdateControllers = false;
}

void StatusBarManager::RemoveControllers()
{
    DBG_TESTSOLARMUTEX();
    assert(!m_bDisposed);

    std::for_each( m_aControllerMap.begin(),
                   m_aControllerMap.end(),
                   lcl_RemoveController< StatusBarControllerMap >() );
    m_aControllerMap.clear();
}

void StatusBarManager::CreateControllers()
{
    uno::Reference< awt::XWindow > xStatusbarWindow = VCLUnoHelper::GetInterface( m_pStatusBar );

    for ( sal_uInt16 i = 0; i < m_pStatusBar->GetItemCount(); i++ )
    {
        sal_uInt16 nId = m_pStatusBar->GetItemId( i );
        if ( nId == 0 )
            continue;

        OUString aCommandURL( m_pStatusBar->GetItemCommand( nId ));
        bool bInit( true );
        uno::Reference< frame::XStatusbarController > xController;
        AddonStatusbarItemData *pItemData = static_cast< AddonStatusbarItemData *>( m_pStatusBar->GetItemData( nId ) );
        uno::Reference< ui::XStatusbarItem > xStatusbarItem = new StatusbarItem( m_pStatusBar, nId, aCommandURL );

        beans::PropertyValue aPropValue;
        std::vector< uno::Any > aPropVector;

        aPropValue.Name     = "CommandURL";
        aPropValue.Value    <<= aCommandURL;
        aPropVector.push_back( uno::Any( aPropValue ) );

        aPropValue.Name     = "ModuleIdentifier";
        aPropValue.Value    <<= OUString();
        aPropVector.push_back( uno::Any( aPropValue ) );

        aPropValue.Name     = "Frame";
        aPropValue.Value    <<= m_xFrame;
        aPropVector.push_back( uno::Any( aPropValue ) );

        // TODO remove this
        aPropValue.Name     = "ServiceManager";
        aPropValue.Value    <<= uno::Reference<lang::XMultiServiceFactory>(m_xContext->getServiceManager(), uno::UNO_QUERY_THROW);
        aPropVector.push_back( uno::Any( aPropValue ) );

        aPropValue.Name     = "ParentWindow";
        aPropValue.Value    <<= xStatusbarWindow;
        aPropVector.push_back( uno::Any( aPropValue ) );

        // TODO still needing with the css::ui::XStatusbarItem?
        aPropValue.Name     = "Identifier";
        aPropValue.Value    <<= nId;
        aPropVector.push_back( uno::Any( aPropValue ) );

        aPropValue.Name     = "StatusbarItem";
        aPropValue.Value    <<= xStatusbarItem;
        aPropVector.push_back( uno::Any( aPropValue ) );

        uno::Sequence< uno::Any > aArgs( comphelper::containerToSequence( aPropVector ) );

        // 1) UNO Statusbar controllers, registered in Controllers.xcu
        if ( m_xStatusbarControllerFactory.is() &&
             m_xStatusbarControllerFactory->hasController( aCommandURL, "" ))
        {
            xController.set(m_xStatusbarControllerFactory->createInstanceWithArgumentsAndContext(
                                aCommandURL, aArgs, m_xContext ),
                            uno::UNO_QUERY );
            bInit = false; // Initialization is done through the factory service
        }

        if ( !xController.is() )
        {
            // 2) Old SFX2 Statusbar controllers
            xController = CreateStatusBarController( m_xFrame, m_pStatusBar, nId, aCommandURL );
            if ( !xController )
            {
                // 3) Is Add-on? Generic statusbar controller
                if ( pItemData )
                {
                    xController = new GenericStatusbarController( m_xContext,
                                                                  m_xFrame,
                                                                  xStatusbarItem,
                                                                  pItemData );
                }
                else
                {
                    // 4) Default Statusbar controller
                    xController = new svt::StatusbarController( m_xContext, m_xFrame, aCommandURL, nId );
                }
            }
        }

        m_aControllerMap[nId] = xController;
        if ( bInit )
        {
            xController->initialize( aArgs );
        }
    }

    // add frame action listeners
    if ( !m_bFrameActionRegistered && m_xFrame.is() )
    {
        m_bFrameActionRegistered = true;
        m_xFrame->addFrameActionListener( uno::Reference< frame::XFrameActionListener >(this) );
    }
}

void StatusBarManager::FillStatusBar( const uno::Reference< container::XIndexAccess >& rItemContainer )
{
    SolarMutexGuard g;

    if ( m_bDisposed || !m_pStatusBar )
        return;

    sal_uInt16         nId( 1 );

    RemoveControllers();

    // reset and fill command map
    m_pStatusBar->Clear();
    m_aControllerMap.clear();// TODO already done in RemoveControllers

    for ( sal_Int32 n = 0; n < rItemContainer->getCount(); n++ )
    {
        uno::Sequence< beans::PropertyValue >   aProps;
        OUString                                aCommandURL;
        sal_Int16                               nOffset( 0 );
        sal_Int16                               nStyle( 0 );
        sal_Int16                               nWidth( 0 );
        sal_uInt16                              nType( css::ui::ItemType::DEFAULT );

        try
        {
            if ( rItemContainer->getByIndex( n ) >>= aProps )
            {
                for ( beans::PropertyValue const & prop : std::as_const(aProps) )
                {
                    if ( prop.Name == "CommandURL" )
                    {
                        prop.Value >>= aCommandURL;
                    }
                    else if ( prop.Name == "Style" )
                    {
                        prop.Value >>= nStyle;
                    }
                    else if ( prop.Name == "Type" )
                    {
                        prop.Value >>= nType;
                    }
                    else if ( prop.Name == "Width" )
                    {
                        prop.Value >>= nWidth;
                    }
                    else if ( prop.Name == "Offset" )
                    {
                        prop.Value >>= nOffset;
                    }
                }

                if (( nType == css::ui::ItemType::DEFAULT ) && !aCommandURL.isEmpty() )
                {
                    auto aProperties = vcl::CommandInfoProvider::GetCommandProperties(aCommandURL, "");
                    OUString aString(vcl::CommandInfoProvider::GetLabelForCommand(aProperties));
                    StatusBarItemBits nItemBits( impl_convertItemStyleToItemBits( nStyle ));

                    m_pStatusBar->InsertItem( nId, nWidth, nItemBits, nOffset );
                    m_pStatusBar->SetItemCommand( nId, aCommandURL );
                    m_pStatusBar->SetAccessibleName( nId, aString );
                    ++nId;
                }
            }
        }
        catch ( const css::lang::IndexOutOfBoundsException& )
        {
            break;
        }
    }

    // Statusbar Merging
    constexpr sal_uInt16 STATUSBAR_ITEM_STARTID = 1000;
    MergeStatusbarInstructionContainer aMergeInstructions = AddonsOptions().GetMergeStatusbarInstructions();
    if ( !aMergeInstructions.empty() )
    {
        const sal_uInt32 nCount = aMergeInstructions.size();
        sal_uInt16 nItemId( STATUSBAR_ITEM_STARTID );

        for ( sal_uInt32 i = 0; i < nCount; i++ )
        {
            MergeStatusbarInstruction &rInstruction = aMergeInstructions[i];
            if ( !StatusbarMerger::IsCorrectContext( rInstruction.aMergeContext ) )
                continue;

            AddonStatusbarItemContainer aItems;
            StatusbarMerger::ConvertSeqSeqToVector( rInstruction.aMergeStatusbarItems, aItems );

            sal_uInt16 nRefPos = StatusbarMerger::FindReferencePos( m_pStatusBar, rInstruction.aMergePoint );
            if ( nRefPos != STATUSBAR_ITEM_NOTFOUND )
            {
                StatusbarMerger::ProcessMergeOperation( m_pStatusBar,
                                                        nRefPos,
                                                        nItemId,
                                                        rInstruction.aMergeCommand,
                                                        rInstruction.aMergeCommandParameter,
                                                        aItems );
            }
            else
            {
                StatusbarMerger::ProcessMergeFallback( m_pStatusBar,
                                                       nItemId,
                                                       rInstruction.aMergeCommand,
                                                       rInstruction.aMergeCommandParameter,
                                                       aItems );
            }
        }
    }

    // Create controllers
    CreateControllers();

    // Notify controllers that they are now correctly initialized and can start listening
    UpdateControllers();
}

void StatusBarManager::DataChanged( const DataChangedEvent& rDCEvt )
{
    SolarMutexClearableGuard aGuard;

    if ((( rDCEvt.GetType() == DataChangedEventType::SETTINGS         ) ||
         ( rDCEvt.GetType() == DataChangedEventType::FONTS            ) ||
         ( rDCEvt.GetType() == DataChangedEventType::FONTSUBSTITUTION ) ||
         ( rDCEvt.GetType() == DataChangedEventType::DISPLAY          ))  &&
         ( rDCEvt.GetFlags() & AllSettingsFlags::STYLE               ))
    {
        css::uno::Reference< css::frame::XLayoutManager > xLayoutManager;
        css::uno::Reference< css::beans::XPropertySet > xPropSet( m_xFrame, css::uno::UNO_QUERY );
        if ( xPropSet.is() )
            xPropSet->getPropertyValue("LayoutManager") >>= xLayoutManager;
        if ( xLayoutManager.is() )
        {
            aGuard.clear();
            xLayoutManager->doLayout();
        }
    }
}

void StatusBarManager::UserDraw( const UserDrawEvent& rUDEvt )
{
    SolarMutexClearableGuard aGuard;

    if ( m_bDisposed )
        return;

    sal_uInt16 nId( rUDEvt.GetItemId() );
    StatusBarControllerMap::const_iterator it = m_aControllerMap.find( nId );
    if (( nId <= 0 ) || ( it == m_aControllerMap.end() ))
        return;

    uno::Reference< frame::XStatusbarController > xController( it->second );
    if (xController.is() && rUDEvt.GetRenderContext())
    {
        uno::Reference< awt::XGraphics > xGraphics = rUDEvt.GetRenderContext()->CreateUnoGraphics();

        awt::Rectangle aRect( rUDEvt.GetRect().Left(),
                              rUDEvt.GetRect().Top(),
                              rUDEvt.GetRect().GetWidth(),
                              rUDEvt.GetRect().GetHeight() );
        aGuard.clear();
        xController->paint(xGraphics, aRect, 0);
    }
}

void StatusBarManager::Command( const CommandEvent& rEvt )
{
    SolarMutexGuard g;

    if ( m_bDisposed )
        return;

    if ( rEvt.GetCommand() != CommandEventId::ContextMenu )
        return;

    sal_uInt16 nId = m_pStatusBar->GetItemId( rEvt.GetMousePosPixel() );
    StatusBarControllerMap::const_iterator it = m_aControllerMap.find( nId );
    if (( nId > 0 ) && ( it != m_aControllerMap.end() ))
    {
        uno::Reference< frame::XStatusbarController > xController( it->second );
        if ( xController.is() )
        {
            awt::Point aPos;
            aPos.X = rEvt.GetMousePosPixel().X();
            aPos.Y = rEvt.GetMousePosPixel().Y();
            xController->command( aPos, awt::Command::CONTEXTMENU, true, uno::Any() );
        }
    }
}

void StatusBarManager::MouseMove( const MouseEvent& rMEvt )
{
    MouseButton(rMEvt,&frame::XStatusbarController::mouseMove);
}

void StatusBarManager::MouseButton( const MouseEvent& rMEvt ,sal_Bool ( SAL_CALL frame::XStatusbarController::*_pMethod )(const css::awt::MouseEvent&))
{
    SolarMutexGuard g;

    if ( m_bDisposed )
        return;

    sal_uInt16 nId = m_pStatusBar->GetItemId( rMEvt.GetPosPixel() );
    StatusBarControllerMap::const_iterator it = m_aControllerMap.find( nId );
    if (( nId <= 0 ) || ( it == m_aControllerMap.end() ))
        return;

    uno::Reference< frame::XStatusbarController > xController( it->second );
    if ( xController.is() )
    {
        css::awt::MouseEvent aMouseEvent;
        aMouseEvent.Buttons = rMEvt.GetButtons();
        aMouseEvent.X = rMEvt.GetPosPixel().X();
        aMouseEvent.Y = rMEvt.GetPosPixel().Y();
        aMouseEvent.ClickCount = rMEvt.GetClicks();
        (xController.get()->*_pMethod)( aMouseEvent);
    }
}

void StatusBarManager::MouseButtonDown( const MouseEvent& rMEvt )
{
    MouseButton(rMEvt,&frame::XStatusbarController::mouseButtonDown);
}

void StatusBarManager::MouseButtonUp( const MouseEvent& rMEvt )
{
    MouseButton(rMEvt,&frame::XStatusbarController::mouseButtonUp);
}

IMPL_LINK_NOARG(StatusBarManager, Click, StatusBar*, void)
{
    SolarMutexGuard g;

    if ( m_bDisposed )
        return;

    sal_uInt16 nId = m_pStatusBar->GetCurItemId();
    StatusBarControllerMap::const_iterator it = m_aControllerMap.find( nId );
    if (( nId > 0 ) && ( it != m_aControllerMap.end() ))
    {
        uno::Reference< frame::XStatusbarController > xController( it->second );
        if ( xController.is() )
        {
            const Point aVCLPos = m_pStatusBar->GetPointerPosPixel();
            const awt::Point aAWTPoint( aVCLPos.X(), aVCLPos.Y() );
            xController->click( aAWTPoint );
        }
    }
}

IMPL_LINK_NOARG(StatusBarManager, DoubleClick, StatusBar*, void)
{
    SolarMutexGuard g;

    if ( m_bDisposed )
        return;

    sal_uInt16 nId = m_pStatusBar->GetCurItemId();
    StatusBarControllerMap::const_iterator it = m_aControllerMap.find( nId );
    if (( nId > 0 ) && ( it != m_aControllerMap.end() ))
    {
        uno::Reference< frame::XStatusbarController > xController( it->second );
        if ( xController.is() )
        {
            const Point aVCLPos = m_pStatusBar->GetPointerPosPixel();
            const awt::Point aAWTPoint( aVCLPos.X(), aVCLPos.Y() );
            xController->doubleClick( aAWTPoint );
        }
    }
}

}

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